The main goal of the isobar collisions (\(^{96}\) Ru+\(^{96}\) Ru and \(^{96}\) Zr+\(^{96}\) Zr at \(\mbox{$\sqrt{s_{\mathrm {NN}}}$}=200\)  GeV) at the Relativistic Heavy Ion Collider (RHIC) is to search for the ellusive chiral magnetic effect (CME) [1]}, [2]}. Since \(^{96}\) Ru contains more protons than \(^{96}\) Zr, \(^{96}\) Ru+\(^{96}\) Ru collisions generate stronger initial magnetic fields than \(^{96}\) Zr+\(^{96}\) Zr collisions, leading to potentially detectable differences in the CME sensitive observables, such as the \(\Delta \gamma _{112}\)  correlator [3]}. However, no evidence of the CME signal has been found in the first isobar analysis from the STAR Collaboration [4]}. Instead, the search uncovers significant differences in many observables, supportive of the structure differences between the two nuclei [5]}. In particular, the collective-flow results reveal large deformations in the two nuclei [6]}, as well as a difference in the neutron skin [7]}. This opens up a new opportunity to probe the collective nuclear structure using high-energy isobar collisions [8]}. Ultimately, the effects of nuclear structures [9]} and the nonflow backgrounds [10]} have to be accounted for, before any residual differences might be attributable to the genuine CME signal.
